程序控制DataGrid的分页

public string cPage;
  
 
  private void Page_Load(object sender, System.EventArgs e)
  {
   if(!IsPostBack)
   {
    dataBind();
   }
  }
  public void dataBind()
  {
   cPage="1";
   if(Request.QueryString["Page"]!=null)
   {
    cPage=Request.QueryString["Page"];
   }

   dgTitle.CurrentPageIndex=Int32.Parse(cPage)-1;
   
   dgTitle.DataSource=bind.tableBind(Convert.ToInt32(Request.QueryString["id"]));
   dgTitle.DataBind();
  
   ShowStates();
   
  }
  private void ShowStates()
  {
   
   PageInfo.Text="页次：<font color='#FF0000'>"+(dgTitle.CurrentPageIndex+1)+"</font>/<font color='#FF0000'>"+dgTitle.PageCount+"</font>每页<font color='#FF0000'>"+dgTitle.PageSize+"</font>个主题 ";
   JumpTo.Text="" + (dgTitle.CurrentPageIndex+1);

   int temp=dgTitle.CurrentPageIndex/30;
   if(temp==0)
   {
    PageLink.Text+="<A href='showtitle.aspx?Cid="+Request.QueryString["Cid"]+"&Page=1' title=首页><font face=webdings>9</font></a>&nbsp;&nbsp;";
   }
   else
   {
    PageLink.Text+="<A href='ListArticle.aspx?Cid="+Request.QueryString["Cid"]+"&Page=1' title=首页><font face=webdings>9</font></a>&nbsp;&nbsp;<A href='showtitle.aspx?Cid="+Request.QueryString["Cid"]+"&Page="+((temp+1)*10-10)+"' title=上十页><font face=webdings>7</font></a>&nbsp;&nbsp;";
   }
   for(int i=(temp+1)*10-9;i<=(temp+1)*30;i++)
   {
    if(i>dgTitle.PageCount)
    {
     break;
    }
    else if(i==dgTitle.CurrentPageIndex+1)
    {
     PageLink.Text+="<FONT color='red'><b>"+i.ToString()+"</b></Font>&nbsp;&nbsp;";
    }
    else
    {
     PageLink.Text+="<A href='showtitle.aspx?Cid="+Request.QueryString["id"]+"&Page="+i+"'><b>"+i.ToString()+"</b></a>&nbsp;&nbsp;";
    }
   }

   if(temp==(dgTitle.PageCount-1)/30)
   {
    PageLink.Text+="<A href='showtitle.aspx?Cid="+Request.QueryString["id"]+"&Page="+dgTitle.PageCount+"' title=尾页><font face=webdings>:</font></a>";
   }
   else
   {
    PageLink.Text+="<A href='showtitle.aspx?Cid="+Request.QueryString["id"]+"&Page="+((temp+1)*10+1)+"' title=下十页><font face=webdings>8</font></a>&nbsp;&nbsp;<A href='showtitle.aspx?id="+Request.QueryString["id"]+"&Page="+dgTitle.PageCount+"' title=尾页><font face=webdings>:</font></a>";
   }

  }

  #region Web 窗体设计器生成的代码
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }
  
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {   
   this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion

  private void dgTitle_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
  {
   dgTitle.CurrentPageIndex=e.NewPageIndex;
   dataBind();
  }
  private void Go_NewPage()
  {
   if (Page.IsValid)
   {
    string Topage = JumpTo.Text;
    if (Topage != "")
    {
     if (Int32.Parse(Topage) <= (dgTitle.PageCount) && Int32.Parse(Topage)>0)
     {
      Response.Redirect("showtitle.aspx?id="+Request.QueryString["id"]+"&Page="+Int32.Parse(Topage));
     }
     else
     {
      Response.Redirect("showtitle.aspx?id="+Request.QueryString["id"]+"&Page=1");
     }

    }
   }
  }
  private void btnGo_Click(object sender, System.EventArgs e)
  {
   Go_NewPage();
  
  }
 }
}